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Bonding Glassware with UV Curing Adhesives

Bonding Glassware with UV Curing Adhesives. Bob Goss Henkel Loctite Adhesives Ltd. Bonding with UV Adhesives. UV Curing Adhesives The Curing Process Curing Equipment Glass Bonding Applications Secondary Cure Products. UV Curing Adhesives. UV Acrylics UV Cationic Epoxies UV Silicones

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Bonding Glassware with UV Curing Adhesives

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  1. Bonding Glassware with UV Curing Adhesives Bob Goss Henkel Loctite Adhesives Ltd

  2. Bonding with UV Adhesives • UV Curing Adhesives • The Curing Process • Curing Equipment • Glass Bonding Applications • Secondary Cure Products

  3. UV Curing Adhesives • UV Acrylics • UV Cationic Epoxies • UV Silicones • UV Cyanoacrylates

  4. UV Curing Adhesives • Products cure when exposed to UV light • UV • Wavelength • Intensity

  5. Far UVC Near UVA Middle UVB Visible UV 200nm 280nm 320nm 400nm 600nm 60 Adhesive Curing 50 40 INTENSITY 30 20 10 0 300 365 400 500 600 200 220 Wavelength - nm Curing UV Adhesives

  6. UV Wavelengths Depth of Cure Improves Surface Cure Improves

  7. UV Wavelengths • UVV 395-445nm • UVA 320-390nm • UVB 280-320nm • UVC 220-280nm

  8. Surface Cure Depth of Cure Types of UV Bulb General Purpose

  9. UV Intensity • Measured in milliwatts/cm2 (mW/cm2) • Low Intensity 5-10 mW/cm2 • High Intensity 100 mW/cm2 • UV Adhesives require 500-1500 mJoules of UV energy for full cure in a typical application • i.e. 100 mW/cm2 for 5-15 seconds

  10. Liquid Solid UV curing adhesives • Speed of cure and depth of cure are determined by light intensity

  11. 365 nm UV curing adhesives • O2 Inhibition Effect 220 nm required for tack free cure

  12. Determination of Extent of Cure • No Easy Production Method • Establish Limits • Check all other Process Variables • Check UV Lamp Performance

  13. UV Curing Systems

  14. Bench Top UV Curing Systems • Low cost 400 Watt lamp • Ideal for Low Volume Decorative Glass Bonding Applications • Intensity 25 mW/cm2 at UVA

  15. Bench Top UV Curing Systems • High Powered UV unit • 100 mW/cm2 at UVA and UVC • For Tack Free curing

  16. Light Guide UV Curing Systems • High Powered UV Light Guide Unit • >1000 mW/cm2 at UVA and 50 mW/cmUVC • For Tack Free curing • Ideal for small parts.

  17. UV Conveyor Systems • Purpose Built UV systems • For High Volume Production Applications.

  18. Bonding with UV Adhesives • UV Curing Adhesives • The Curing Process • Curing Equipment • Glass Bonding Applications • Secondary Cure Products

  19. Bonding Glass to Metal • Epoxy • Polyurethane • Silicone • Structural Anaerobic • Toughened Acrylic • Cyanoacrylate • UV Curing Product

  20. Benefits of UV Adhesives • Fast cure • Good optical clarity • Cure on demand • Single part - easy to automate • Excellent adhesion • Secondary cure option

  21. Application areas • Decorative glassware • Medical disposables • Electronic component potting/coating • Furniture manufacture • Costume Jewellery • Optical instruments

  22. Glass Bonding • Cyclops is bonded to Facia

  23. Parameters to consider • Viscosity of Adhesive • Deep curing/Substrate absorption • Handling times  • Secondary Cure • Environment

  24. Glass Coloured Glass Glass Filter effect of substrate

  25. Secondary Cure

  26. Glass to Metal Bonding • UV anaerobic ensures full cure • UV Adhesive is Dishwasher safe

  27. Bonding Plastics • Swimming Goggles • Blood Filters

  28. Summary of UV Adhesives • Cure Speed – Seconds • Wide range of Viscosities • Good Cure Through Volume • Typical Operating Temperature 120°C

  29. Bonding Glassware with UV Curing Adhesives Bob Goss Henkel Loctite Adhesives Ltd

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